feat: restructure hierarchy when item and child have same name

src/demo/app/hierarchical/hierarchical.component.html

@@ -8,7 +8,7 @@ <h1>Exemple ngx-tree-select with flat datas</h1>
       <form novalidate>
         <tree-select name="simpleSelect" [items]="items" idField="id" textField="name" childrenField="children" [(ngModel)]="simpleSelected"
           required=true #simpleSelect="ngModel" [filterPlaceholder]="FilterPlaceholder" [allowFilter]="ShowFilter" [disabled]="Disabled"
-          [allowParentSelection]="AllowParentSelection"></tree-select>
+          [allowParentSelection]="AllowParentSelection" [restructureWhenChildSameName]="RestructureWhenChildSameName"></tree-select>
         <div *ngIf="simpleSelect.errors && (simpleSelect.dirty || simpleSelect.touched)" class="alert alert-danger">
           <div [hidden]="!simpleSelect.errors.required">Simple select is required</div>
         </div>
@@ -25,7 +25,7 @@ <h1>Exemple ngx-tree-select with flat datas</h1>
         <tree-select name="multipleSelect" [items]="items" idField="id" textField="name" childrenField="children" [multiple]="true"
           [(ngModel)]="multipleSelected" filterPlaceholder="Type item filter..." required=true minlength="2" maxlength="4"
           [allowParentSelection]="AllowParentSelection" #multipleSelect="ngModel" [filterPlaceholder]="FilterPlaceholder" [maxVisibleItemCount]="MaxDisplayed"
-          [allowFilter]="ShowFilter" [disabled]="Disabled" expandMode="All">
+          [allowFilter]="ShowFilter" [disabled]="Disabled" expandMode="All" [restructureWhenChildSameName]="RestructureWhenChildSameName">
         </tree-select>
         <div *ngIf="multipleSelect.errors && (multipleSelect.dirty || multipleSelect.touched)" class="alert alert-danger">
           <div [hidden]="!multipleSelect.errors.required">Multiple select is required</div>

src/demo/app/hierarchical/hierarchical.component.ts

@@ -9,6 +9,7 @@ export class HierarchicalComponent {
   public items = HierarchicalCountries;
 
   public AllowParentSelection = true;
+  public RestructureWhenChildSameName = false;
   public ShowFilter = true;
   public Disabled = false;
   public FilterPlaceholder = 'Type here to filter elements...';

src/ngx-tree-select/src/components/tree-select-item.component.ts

@@ -39,11 +39,19 @@ export class TreeSelectItemComponent {
     return this.svc.Configuration.allowParentSelection;
   }
 
+  get restructureWhenChildSameName(): boolean {
+    return this.svc.Configuration.restructureWhenChildSameName;
+  }
+
   get needCheckBox(): boolean {
     return this.svc.Configuration.isHierarchy() && this.svc.Configuration.allowMultiple;
   }
 
   public get haveChildren(): boolean {
+    if(this.restructureWhenChildSameName && this.item && this.item.children && this.item.children.length == 1 && this.item.text == this.item.children[0].text)
+    {
+      this.item = this.item.children[0];
+    }
     return this.item && this.item.children && this.item.children.length > 0;
   }
 

src/ngx-tree-select/src/components/tree-select.component.ts

@@ -61,10 +61,21 @@ export class TreeSelectComponent implements ControlValueAccessor {
   public set allowParentSelection(value: boolean) {
     this.svc.setConfiguration((opt) => opt.allowParentSelection = value, true);
   }
+
   public get allowParentSelection(): boolean {
     return this.svc.Configuration.allowParentSelection;
   }
 
+
+  @Input()
+  public set restructureWhenChildSameName(value: boolean){
+    this.svc.setConfiguration((opt) => opt.restructureWhenChildSameName = value, true);
+  }
+
+  public get restructureWhenChildSameName(): boolean {
+    return this.svc.Configuration.restructureWhenChildSameName;
+  }
+
   @Input()
   public set childrenField(value: string) {
     this.svc.setConfiguration((opt) => opt.childProperty = value, true);

src/ngx-tree-select/src/models/select-option.ts

@@ -12,6 +12,7 @@ export class SelectOption {
   public filter = '';
   public filterCaseSensitive = false;
   public allowParentSelection = false;
+  public restructureWhenChildSameName = false;
   public maxVisibleItemCount: number;
   public expandMode = ExpandMode.None;